Staple extractor



2 SHEETS-SHEET 1 H L. NEILSEN STAPLE EXTRACTOR March 17, 1953 Flled June 14 1948 March 17, 1953 H. l.. NEILSEN 2,63815 STAPLE EXTRACTOR Filed June 14, 194e 2 smsETs-smm 2 Patented Mar. 17, 1953 STAPLE EXTRACTOR Hildaur L. Neilsen, Metuchen, N. J., assgnor to Speed Products Company, Inc., New York, N. Y., a corporation of New York Application June 14, 1948, Serial No. 32,825

28 Claims.

This invention is concerned with an eicient and simplified staple extractor and one important object thereof is realized in the provision of a slidably guided, spring controlled, and normally retracted jlaw having a claw or finger adapted to be positioned over and beyond a wire.

staple desirably clinched to a body for appropriately cooperating with the bridge of the staple when shifted rearwardly relative to a fixed anvil for drawing the clinched staple over a forked and forwardly converging po-rtion of the anvil for effectively opening the clinched staple whereby its legs are spread outwardly to allow for its oonvenient and prompt removal from the body previously clinched by the staple. More specifically another object resides in the provision of a normally retracted slidably guided jaw reciprocably interposed between a casing and anvil and having conveniently accessible manipulatable means for bodily shifting the jaw rearwardly relative to the anvil andag-ainst the resistance of a normally contracted and appropriately concealed helicoidal spring. Other important objects and functional and structural features of the invention will appear from the following detailed specification considered in the light of the accompanying drawings wherein:

Fig. 1 is a plan view of the staple extractor shown partly broken.

Fig. 1A is a sectional view on the line IA-IA of Fig. 1.

Fig. 2 is a longitudinal and axial sectional view of Fig. 1.

Fig. 3 is a front view of Fig. 1.

Fig. 4 is a side elevational View of Fig. 1.

Fig. 5 shows fragmentary plan views of Fig. 1 illustrating the reciprocable jaw in several position-s of its staple extracting stroke.

Fi-g. 6 is an exploded view of the staple extractor illustrated in Figs. 1-5, however illustrating the casing reversed.

Fig. '7 isa longitudinal sectional view of the staple extractor according to another embodiment of my invention.

Fig. 7A is a fragmentary view of Fig. 7 however illustrating the staple extractor tilted slightly and the claw thereof eng-aging the bridge of a clinchedstaple about to be opened and extracted.

Fig. 8 is a view taken on the line 8 8 of Fig. 7.

lFig. 9 is a transverse sectional view on the line which preferably is of a suitable plastic is thethumb rest'R having heel II extending below the body of the housing and providing the-nat surface I2 seated on the flat sheet metal base or anvil A embodying at its forward end the spaced and tapered prongs I4.

Slidably interposed between the hollow housing H and lanvil A is the reciprocable jaw or member J provided at its foremost end with the Y depending hook or claw I5. Thisl jaw is in the form of a U-shap-ed saddle more particularly characterized bythe flat bottom wall I6 from which hook or claw I5 projects downwardly to cooperate with a staple S to be extracted from the paper P.

Spaced sides I1 are integral with. thefbottom wall I6 and extend upwardly to closely but slidably straddle side faces I8 of the housing which serves as a guide for the jaw as it relative to thehousing.

Wings o-r manipulators W extend laterally oi' the slidable jaw and cooperate with lateral projections I9 of the rest or stop R to limit rearward displac-ement of the jaw J on the extracting stroke thereof.

Also rectilinearly guiding jaw J relative to the housing is the internally threaded ferrule 20 appropriately anchored'to the bodyof the'housing and projecting downwardly into channel or recess I0 to be straddled by the spaced sides 2l of the elongated slot 22 in the bottom wall |16 of the jaw J.

- Ferrule 20 has a lower widened portion which in association with heel II serves to space the anvil A away from the housing or casing H to prov-ide the elongated gap 23 in which the bottom wall I6 of thejaw is slidably confined and guided between the anvil and the housing.

For normallymaintaining the jaw retracted, that is, in a non-extracting'relation to overhang the anvil there is provided a normally compressed U-shaped helicoidal spring 24 disposed within the channel I0 and having its medial portion trained over the stud or abutment 25 xed to the body of the housing or casingI-I while the end coils 2-6 of the spaced legs 21 of this spring are hooked on and held by the biased lugs 28 projecting from the rear of the bottom wall I 6 of the reciprocable jaw J. By this arrangement it is apparent that if the jaw be urged towards the rest or stop R legs 2l o-f spring 214 will become distended. f

Upon removal of finger pressure from wings W, jaw J automatically retracts until rear end 30 of slot 22 strikes the enlarged bottom part of ferrule 20 (Fig. 2) which serves as a stop to limit such retraction at which time claw I5 is spaced from the forward end of the fork F defined by the spaced forwardly converging prongs or tines I4 to permit therebetween convenient reception of a staple Sto be extracted. f

. Effectively and in part anchored within th linearly moves spacer or heel l2 and secured to the body of the housing is the internally threaded nipple or ferrule 3l whichy projects into gap 23and also serves to space the housing H away from the anvil A.

Spaced screws 32 and 33 desirably cooperate with ferrules 3! and 25 respectively to hold the anvil it is clearly free of the paper but' at such time spring V2t has its legs 21 elongated or distended. Pursuant to such extraction the operators thumb is' removed' from theA concaved portion 36 ofL thestop R2 and nger pressure from the wings W and consequently the jaw is again retracted to its' normal position shown in liigs. 1 and 2 due to the recoil of legs 21.

In the'form according to Figs. 7-11, thereotangular shaped housing or casingY H' widely straddles the-anvil generallyfdesignated A having the onset fork F' provided'with th'espaced tapering prongs' i4". More particularly' fork F' is integral but offset' from the bottom wall 50 ofthe anvil A by the inclined portion The casing H' is in the form of an inverted U-shaped receptacle having top wall 52 and the depending sides 53 which widely straddle the upstandingr` sides or rails 54 of the anvil A' having fixed therein the internally threaded` cylindrical boss 55 provided with the reduced nipple 56 projecting into and cooperating with the sides and end walls of the elongated slot 51 to linearly guidethe the sldable member` or jaw broadly designated J and to limit forward or rearward displacement thereof relative to the anvil A which is slidably straddled by depending sides 58 ofthe jaw J in turn` also slidably guided by rails or sides 54 telescopically received by the channel shaped shoe-59 of' which the depending jaw orfmember J at which time coiled spring 64 having its ends desirably threaded or hooked on lugs 65 and 66 projecting from the reciprocabl'y guided jaw J and anvil A' is fully com-- presse-d and the rear end` ofl slot 51' of the top wall 6T of shoe 59-is against the fixed stop collar or nipple'56Y (Fig. '7).

The top wall 52 of housing I-I substantiallyfully covers the top wall 61 of the shoe 5B at the conclusionof the extracting stroke of the slidable jaw J that is, when' the front endv of the slot 51 is against collar 56'. WallV 51 of the slidably guided shoe or box 59 is guided in alined gaps or slots 68 dened by the top wall 52 of the housi'ng H and the top faces of the spaced rails 0r sides 54. A

Extending rearwardlyv of the bottom wall 50 of theanvil A is'the hookl'adapted to'bein'terlocked with shoulder 1| formed by the recess 12 at which time screw 13 is projected through the top wall 52 of the-casingand threadablyisecured to the collar 55 and stop 55 to hold the anvil A' and housing I-I together although permitting the jaw J to be slidably actuated against the resistance of the normally contracted spring 64 for extracting a clinchingl staple at which time hook i5 draws the staple' across the fork as is Well understood.

The staple extractors herein disclosed permit convenient application to many sizes of staples due tothe forwardly converging or tapered relation of the prongs or tines I4 which can be easily brought under various widths of staples and more particularlyv under thebridges thereof. Thereafter" the claw or hook of` the slidable jaw" cooperatesv to draw the' clinched staple over the: tapered prongs of' the fork: By such action-the cl'inching legs of the staple--are-opened or' diverged. outwardly' and subsequently' the staple is pulled` or extracted completely from thepaperor other' suitable body into whichitwas previouslyy driven'. and clinched.

In the form according to Figs. 1 6' the extractor is disposed substantially horizontally during the#v extracting stroke of the jaw but in the use of thev form illustrated in Figs. 7-11 the fork is held in a tilted relation as shown in Fig'. 7A' sinceA the" bottom faces St of the prongs I4 normally slope: upwardly and forwardly. It should bealso ob` served that in Figs. '1--11` structural features cor responding to those illustrated in Figs. 1-6 have been primed. In the form according to Figs. 7-11 however, on the return or retractive-stroke control of claw I5." after having withdrawn the for-- merly clinchedstaple over tines I4', projection 6I which extends into gap or slot 62 also cooperates; with thek bridge of the withdrawn butI unclinched staple to eject or kick 01T the latter from fork F. Thus the latter is means'to extract the clinched staple and means to eject theV unclinched staple from the fork.

Various changes may be made inldetails of 'construction and.' arrangement of parts withoutV departing from the spirit of the invention or sacrificing anyl of; the advantages thereof inherent therein.

I claim:

1. In a device for extracting a staple, an anvil, a casing above said anvil, a movable member interposed between saidv casing and anvil and linearly movable therebetween and having at its'- front end a depending claw normally in advance of and spaced from andv overhanging the front" end of said anvil for drawing said staple rear-1 wardly oversaidanvil, and spring means retained withinsaid casing and attached to said member to resist rearward displacementof the latter relative to said anvil.

2i In a device for extracting a staple, an anvil' having a forwardly arranged fork, a casing mounted on said anvil and arranged to the rear of said fork., a movable member in part interposed between said casing and anvil and having a front part normally disposed forwardly of theV front part. of. said Casingv and a rear part normally disposed to the rear of said frontpart of said casing, means linearly guiding said member between said casing and anvil, said member having at its front end a depending claw removably receivable in said fork and normally in advance of and spaced from and overhanging the front end of said fork for drawing said staple rearwardly over' said" anvil, spring meansto resist d's- 'placement 'of said `member rearwardly of said fork, and manipulatable means carried by said member for bodily actuating the latter against the resistance of said spring means.

3. In a device for extracting a staple, an anvil having a forwardly arranged fork, a casing .part of said casing, means linearly guiding said member between said casing and anvil, said member having at its front end a depending claw removably receivable in said fork and normally in advance of and spaced from and overhanging the front end of said fork for drawing said staple rearwardly over said anvil, spring means to resist -displacement of said member rearwardly of said fork, manipulatable means carried by said mem- .ber for bodily actuating theA latter against the resistance of said spring means, and a projection extending downwardly from said member and `closely spaced from the rear part of said claw for urging said drawn staple forwardly over and 4.beyond said fork.

4. In a device for extracting a staple, an anvil .having a forwardly arranged fork, a casing mounted on said anvil and disposed to the rear of said fork, a movable member normally in part interposed between said casing and anvil and having a front part normally disposed forwardly r front end of said fork for drawing said staple rearwardly over said anvil, helicoidal spring means to resist displacement of said member "rearwardly of said fork, and manipulatable means carriedby said member for bodily actuating the `latter against Ythe resistance of saidspring means.

5. In a device for extracting a staple, an anvil vhaving a forwardly arranged fork, a casing mounted onsaid anvil. and arranged. to the rear 4*of said fork and in part spaced from said anvil todene a gap therebetween, ajaw in part within 'said gap and having a claw normally in advance of and spaced from and overhanging the front part of sai-d anvil and shiftable into said fork `for drawing said staple'v over said fork, means linearly guiding said jaw `relative to said anvil, helicoidal spring'means attached to said jaw and retained within said casing to resist displacement of said jaw rearwardly of said fork, and manipulatable means carried by said jaw for bodily actuating the latter against the resistance of said spring means. Y

6. In a device for extracting a staple-an anvil having a forwardly arrangedv fork, a casing .mounted on said anvil and arranged to the rear Vof said fork and in part spaced from said anvil Ito define a gap therebetween, a jaw in part within vsaid gap and having a depending claw normally overhanging said anvil for drawing said staple over said fork, said jaw and anvil having means linearly guiding said jaw relative to said casing Aand anvil, helicoidal spring means attached to vsaid jawand retained within -said casing to resist displacement of said jaw rearwardly of said fork',

Vand`manipulatable means carried by said jaw for 'bodily Vactuating the latterv against the resistance of said spring means.

7. In a device for actuating a staple, an anvil having a forwardly arranged fork, a casing mounted on said anvil and arranged to the rear of said fork and in part spaced from said anvil to define a gap therebetween, a jaw in part within said gap and having a depending claw normally .overhanging said anvil for drawing said staple over said fork, said jaw and casing having means Vlinearly guiding said jaw relative to said anvil,

helicoidal spring means attached to said jaw and retained within said casing to resist displacement of said jaw rearwardly of said fork, and manipulatable means carried by said jaw for bodily actuating the latter against the resistance of said spring means.

8. In a device for extracting a staple, an anvil having a forwardly arranged fork defining spaced and forwardly converging tines, a casing mounted on said anvil and arranged to the rear of said V fork and in part spaced from said anvil to define a gap therebetween, a jaw in part within said gap and having a claw normally overhanging said anvil for drawing said staple over Sai-d tines, means linearly guiding said jaw relative to said anvil, helicoidal spring means attached to said jaw and retained within said casing to resist displacement of said jaw rearwardly of said fork, and manipulatable means carried by said jaw for bodily actuating the latter against the resistance of said spring means.

9. In a device for extracting a staple, a relatively flat anvil having a forwardly arranged fork, a casing mounted on said anvil and arranged to the rear of said fork and in part spaced from said anvil to dene a gap therebetween, a jaw in part within said gap and having a claw normally overhanging said anvil for drawing said staple over said fork, means linearly guiding said jaw relative to said anvil, helicoidal spring means attached to said jaw and retained within said casing to resist displacement of said jaw rearwardly of said fork, manipulatable means carried by said jaw for bodily actuating the latter against the resistance of said spring means, and means securing said anvil and casing against separation.

10. In a device for extracting a staple, an anvil having a forwardly arranged fork having spaced tines defining a slot, a casing mounted on said anvil and to the rear of said fork, a slidable mem'- jber normally in part interposed between said casing and anvil and having a front part normally disposed forwardly of the front part of said casing and having a rear part disposed to the rear of said front part of said casing, means linearly guiding said member relative to` said anvil and casing, said member having at its front end a depending claw normally in advance of and spaced from and overhanging the front end of said fork and adapted to be rearwardly projected into said slot to draw said staple rearwardly over said tines, spring means retained within said casing to resist displacement ofv said member rearwardly of said tines, manipulatable means on said member for bodily actuating said member towards the rear part of said casing and against azzerare ofsaid fork'and in part spaced from said anvil to define a gap therebetween, a jaw in part within said gap and having a claw normally overhanging said anvil for drawing said staple over said fork and including spaced and vertically disposed sides movably straddling said casing, means independent of said sides for linearly guiding said jaw relative to said anvil, helicoidal spring means attached to said jaw and retained within said casing to resist displacement of said jaw rearwardly of said fork, and manipulatable means Vcarried by said sides for bodily shifting said jaw .sides for linearly guiding said jaw relative to said anvil, helicoidal spring means attached to said jaw and retained within said casing to resist displacement of said jaw rearwardly of said fork,

.and laterally extending manipulatable means carried by said sides for bodily shifting said jaw against the resistance of said spring means.

13. In a device for extracting a staple, an anvil having a forwardly arranged fork having spaced tines defining a slot, a casing mounted on said anvil and arranged to the rear of said fork and in part spaced from said anvil to define a gap therebetween, a jaw in part within said gap and having a claw normally overhanging said anvil and adapted to be projected into said slot to draw said staple over said fork and including spaced and vertically' disposed sides movably :straddling said casing, means independent of said .sides for linearly guiding said jaw relative to said anvil, a stud secured to and within said casing, helicoidal spring means having ends attached to said jaw and having an intermediate portion trained over said stud, manipulatable means carried by said sides for bodily shifting said jaw against the resistance of said spring means, and means securing said anvil and casing against separation.

14. In a device for extracting a staple, an anvil having a forwardly arranged fork having spaced tines defining a slot, a casing mounted on said anvil and arranged to the rear of said fork and in part spaced from said anvil to define a gap therebetween, a jaw in part within said gap and having a claw normally overhanging said anvil and adapted to be projected into said slot to draw said staple over said fork and including spaced and vertically disposed sides movably straddling said casing, means independent of said sides for linearly guiding said jaw relative to said anvil, a stud secured to and within said casing,

U-shaped normally contracted helicoidal spring means attached to said jaw and trained over said stud to resist displacement of said jaw rearwardly of said fork, a thumb rest at the rear end of said casing, and manipulatable means carried by said sides for bodily shifting said jaw against the nanvlto denne ya gap therebetween, a jaw in part within said gap and having at its forward part a claw normally overhanging said anvil to draw said staple over said fork and including vspaced and vertically disposeddepending sides closelyl but movably straddling said anvil, means independent of said sides for linearly,guiding said jaw relative to said anvil and casing, helicoidal spring means within said anvil and attached thereto and to said jaw to normally dispose said claw in advance of said fork, and depressed manipulatable means rintegral with said jaw and to the rear of said claw for bodily shifting said jaw rearwardly'relative to said anvil and against the resistance of said spring means.

16. In a device for extracting a staple, an anvil having spaced rails and a forwardly arranged fork offset relative to said rails, la casing mounted on said anvil and arranged to the rear of said fork and in part spaced from said anvil to define a ygap therebetween, a jaw in part within said gap and having at its forward part a claw normally overhanging said anvil and projectible into said fork to draw said staple over said fork and including spaced andvertically disposed depending sides closely but slidably straddling said rails, means independent of said sides for linearly guiding said jaw relative to said anvil, helicoidal spring means within said anvil and attached thereto and to said jaw to normally dispose said claw in advance of said fork, and manipulatable means integral with said jaw and to the rear of said claw for bodily shifting said jaw rearwardly rela-tive to said anvil and against the resistance of said spring means.

17. In a device for extracting a staple, an anvil having a forwardly arranged and oiset fork, a casing mounted on said anvil and arranged to the rear of said fork and in part spaced from said anvil to dene a gap therebetween, a jaw in part within said gap and having at its forward part a claw normally overhanging said anvil and projectible therein to draw said staple over said fork and including spaced and vertically disposed depending sides closely but movably straddling said anvil, means independent of said sides for linearly guiding said jaw relative to said anvil and casing, helicoidal spring means within said anvil and attached thereto and to said jaw to normally dispose said claw in advance of said fork, manipulatable means carried by said claw and to the rear of said claw for bodily shifting said jaw rearwardly relative to said anvil and against the resistance of said spring means, a shoulder at the rear of said casing, anda hook carried by said anvil for removably engaging said shoulder.

18. In a device for extracting a staple, an anvil having a Vforwardly larranged and offset fork having spaced tines defining a slot, a casing mounted on said anvil and arranged to the rear of said fork and in part spaced from said anvil to define a gap therebetween, a jaw in part within said gap and having at its forward part aV claw normally overhanging said anvil and projectible therein to draw said staple over said fork and including spaced and vertically disposed depending sides closely but movably straddling said anvil, spaced means independent of said sides and extending into said jaw and said slot for linearly guiding said jaw relative to said anvil and casing, helicoidal spring means within said anvil and attached thereto and to said jaw to normally dispose saidclaw in advance of said fork, and depressed manipulatable ymeans integral with said Jaw and to the rear 'of said claw for bodi1y'shift ing said jaw rearwardly relative to said anvil and against the resistance of said spring means.

19. In a device for extracting .a staple, an anvil, a casing above said anvil, a slidable member interposed between said casing and anvil and having a depending claw normally disposed in advance of said anvil for drawing a staple in a direction towards said casing and rearwardly over said anvil to unclinch said staple, spring means retained within said casing and attached to said member to resist rearward displacement of the latter relative to said anvil, and means carried by said member for urging said unclinched staple forwardly in a direction away from said casing and off said anvil.

20. In a device for extracting a staple, an anvil .having a forwardly arranged fork, a casing mounted on said anvil and disposed at the rear of said fork, a member interposed between said anvil and casing and having a claw normally overhanging said anvil and shiftable into said fork for drawing said staple over said fork to unclinch said staple, means linearly guiding displacement of said member relative to said anvil, helicoidal spring means to resist displacement of said member rearwardly of said fork, manipulatable means carried by said member for bodily actuating the latter against the resistance of said spring means, and projecting means carried by said member to the rear of said claw for ejecting said unclinched staple from said fork.

21. In a device for extracting a staple, an anvil having a forwardly arranged fork having spaced tines dening a slot, a casing mounted on said anvil and arranged to the rear of said fork and in part spaced from said anvil to define a gap therebetween, a jaw in part within said gap and having a claw disposed forwardly of and outside of said slot and normally7 overhanging said anvil and adapted to be projected into said slot to draw said staple over said fork and including spaced and vertically disposed sides movably straddling said casing, means independent of said sides for linearly guiding said jaw relative to said anvil, a stud secured to and within said casing, U-shaped normally contracted helicoidal spring means attached to said jaw and trained over said stud to resist displacement of said jaw rearwardly of said fork, a thumb rest at the rear end of said casing, and manipulatable means carried by said sides for bodily shifting said jaw against the resistance of said spring means.

22. In a device for extracting a staple, an anvil having a forwardly arranged fork having spaced tines defining a longitudinally arranged slot and defining outside converging sides, a casing mounted on said anvil and to the rear of said fork, a slidable member interposed between said anvil and casing and having ya claw normally disposed forwardly of and outside of said slot and adapted to be projected into said slot and adapted to draw said staple over said fork in a direction towards said casing to unclinch said staple, spring means to resist displacement of said member rearwardly of said fork, reciprocable means carried by said member for bodily actuating the latter against the resistance of said spring means, and means projecting downwardly from said member into said slot and closely spaced from the rear part -of said claw for urging said unclinched staple away from said casing and forwardly of said fork and beyond said tines.

23. In a device for extracting a staple, an -anvil having a forwardly arranged fork having spaced tines defining a slot, a casing mounted on said anvil and to the rear of said fork and in part spaced from said anvil to denne a gap, a slidable member interposed between said anvil and casing and linearly guided in said gap and having a claw normally disposed forwardly of and spaced from said slot and adapted to be projected into said slot and adapted to draw said staple in a direction towards said casing and rearwardly over said fork, spring means to resist displacement of said member rearwardly of said fork, means lcarried by said member to bodily actuate the latter against the resistance of said spring means, and a projection extending downwardly from said member into said slot and spaced from and to the rear of said claw for shifting said drawn staple forwardly away from said casing and ofi said anvil and beyond said tines Y 24. In a device for extracting a staple, an anvil having a forwardly arranged and offset fork having spaced tines dening a slot, a casing mounted on said anvil and arranged to the rear of said fork and in part spaced from said anvil to dene a gap therebetween, a jaw in part within said gap and having at its forward part a claw normally overhanging said anvil and projec-tble therein to draw said staple over said fork and including spaced and vertically disposed depending sides closely but movably straddling said anvil, spaced means independent of said sides and extending into said jaw and said slot for linearly guiding said jaw relative to said anvil and casing, helicoidal spring means within said anvil and attached thereto and to said jaw to normally dispose said claw in advance of said fork, depressed manipulatable means integral with said jaw and to the rear of said claw for bodily shifting said jaw rearwardly relative to said anvil and against the resistance of said spring means, and means extending into said slot to the rear of said claw for expelling said staple from said fork.

25. In a staple extractor, a fork, means for drawing a staple rearwardly over said fork to unclinch said staple, and means for automatically urging said unclinched staple forwardly of and off said fork.

26. In a staple extractor, a fork having spaced tines dening a longitudinally arranged slot and having forwardly converging sides, a member mounted on said fork and having a claw normally spaced from and in advance of said fork for drawing a staple rearwardly over said tines to unclinch said staple, means movably guiding said member relative to said fork, and means carried by said member and spaced from said claw to urge said unclinched staple forwardly over and from said tines.

27. The extractor according to claim 26 wherein said means to urge said unclinched staple comprises a projection depending from said member.

28. The extractor according to claim 27 characterized further in that said projection is disposed to the rear of the front part of said claw movably displaceable in said slot.

HILDAUR L. NEILSEN.

REFERENCES CITED The following references are of record in the rile of this patent:

UNITED STATES PATENTS Number Name Date 1,153,849 Lovering Sept. 14, 1915 2,549,260 Sudbury Apr. 1'7, 1951 2,553,660 Levendusky May 22, 1951 

